We had a simple tray behind the sink, but whenever you would go to the soap and other appliances with wet hands, you would inadvertently cause water to pool below that tray.

This one causes the water to flow back into the sink itself. The feet are printed independently to adjust the hight after measuring the sink height and testprinting a foot.

The feet are then glued to the tray with the spacing, so that the tray isn't completely covering the lip of the sink, but more so being in the middle.

The feet have a whole that make it easy to use hotglue to attach the feet. Just place them, put the glue in the whole, jiggle the foot around a little to smear the glue on the bottom, done.